Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2017 12 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2017   06:12:52   (   0.11,-135.41) (   0.85,-132.17)  369.60                80
 12/20/2017   18:31:41   (  -0.10,-135.35) (   0.21,-136.73)  157.09                80
 12/21/2017   18:13:40   (  -0.10,-135.34) (  -0.91,-131.73)  410.98                80
 12/23/2017   06:32:39   (   0.09,-135.37) (  -0.14,-136.32)  108.85                80
 12/24/2017   06:09:18   (   0.09,-135.36) (   0.98,-131.33)  458.46                80
 12/25/2017   18:28:08   (  -0.08,-135.28) (   0.08,-135.88)   69.75                80
 12/26/2017   18:10:07   (  -0.08,-135.26) (  -1.03,-130.89)  497.67                80
 12/28/2017   06:29:06   (   0.07,-135.29) (   0.06,-135.50)   23.15                80
 12/30/2017   18:24:35   (  -0.07,-135.17) (  -0.11,-135.05)   13.49                80